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dmaengine: sh: rz-dmac: Add DMA clock handling 

Currently, DMA clocks are turned on by the bootloader.
This patch adds support for DMA clock handling so that
the driver manages the DMA clocks.

Fixes: 5000d37042 ("dmaengine: sh: Add DMAC driver for RZ/G2L SoC")
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20210923102451.11403-1-biju.das.jz@bp.renesas.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Biju Das 2021-09-23 11:24:51 +01:00 committed by Vinod Koul
parent c5b64b6826
commit 161596fd77
1 changed files with 14 additions and 0 deletions
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14
drivers/dma/sh/rz-dmac.c
View File

@ -18,6 +18,7 @@
#include <linux/of_dma.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
@ -872,6 +873,13 @@ static int rz_dmac_probe(struct platform_device *pdev)
/* Initialize the channels. */
INIT_LIST_HEAD(&dmac->engine.channels);
pm_runtime_enable(&pdev->dev);
ret = pm_runtime_resume_and_get(&pdev->dev);
if (ret < 0) {
dev_err(&pdev->dev, "pm_runtime_resume_and_get failed\n");
goto err_pm_disable;
}
for (i = 0; i < dmac->n_channels; i++) {
ret = rz_dmac_chan_probe(dmac, &dmac->channels[i], i);
if (ret < 0)
@ -925,6 +933,10 @@ err:
channel->lmdesc.base_dma);
}
pm_runtime_put(&pdev->dev);
err_pm_disable:
pm_runtime_disable(&pdev->dev);
return ret;
}
@ -943,6 +955,8 @@ static int rz_dmac_remove(struct platform_device *pdev)
}
of_dma_controller_free(pdev->dev.of_node);
dma_async_device_unregister(&dmac->engine);
pm_runtime_put(&pdev->dev);
pm_runtime_disable(&pdev->dev);
return 0;
}